MAX1537AETX データシートの表示（PDF） - Maxim Integrated
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MAX1537AETX
Maxim Integrated
MAX1537AETX Datasheet PDF : 38 Pages
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High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VIN = 12V, both SMPS enabled, VCC = 5V, FSEL = REF, SKIP = GND, VILIM_ = VLDO5, VINA = 15V, VLDOA = 12V,
ILDO5 = ILDO3 = ILDOA = no load, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
LDO3 Output Voltage
LDO3 Bootstrap Switch Threshold
VLDO3
Standby mode, 6V < VIN < 26V,
0 < ILOAD < 100mA
Rising edge of CSL3, hysteresis = 1%
3.20 3.35 3.42
V
2.83
3.10
V
LDO3 Bootstrap Switch
Resistance
Short-Circuit Current
LDO3 to CSL3, VCSL3 = 3.2V,
ILDO3 = 50mA
LDO3 = LDO5 = GND,
CSL3 = CSL5 = GND
1
3
Ω
150 220
mA
Short-Circuit Current (Switched
Over to CSL_)
LDO3 = LDO5 = GND, VCSL3 > 3.1V,
VCSL5 > 4.7V
AUXILIARY LINEAR REGULATOR (MAX1537A ONLY)
LDOA Voltage Range
VLDOA
INA Voltage Range
VINA
LDOA Regulation Threshold,
Internal Feedback
ADJA = GND, 0 < ILDOA < 120mA,
VINA > 13V
250
mA
5
23
V
6
24
V
11.4 12.0 12.4
V
ADJA Regulation Threshold,
External Feedback
VADJA
0 < ILDOA < 120mA, VLDOA > 5.0V and
VINA > VLDOA + 1V
1.94 2.00 2.06
V
ADJA Dual-Mode Threshold
0.1
0.15
0.2
V
ADJA Leakage Current
VADJA = 2.1V
-0.1
+0.1
µA
LDOA Current Limit
VLDOA forced to VINA - 1V, VADJA = 1.9V,
150
mA
VINA > 6V
Secondary Feedback Regulation
Threshold
VINA - VLDOA
0.65
0.8
0.95
V
DL Duty Factor
INA Quiescent Current
INA Shunt Sink Current
INA Leakage Current
REFERENCE (REF)
Reference Voltage
Reference Load Regulation
REF Lockout Voltage
FAULT DETECTION
Output Overvoltage Trip
Threshold
IINA
IINA(SHDN)
VINA - VLDOA < 0.7V, pulse width with
respect to switching period
VINA = 24V, ILDOA = no load
VINA = 28V
VINA = 5V, LDOA disabled
VREF
VREF(UVLO)
VCC = 4.5V to 5.5V, IREF = 0
IREF = -10µA to +100µA
Rising edge, hysteresis = 350mV
OVP = GND, with respect to error-
comparator threshold
33
%
50
165
µA
10
mA
30
µA
1.985 2.00 2.015
V
1.980
2.020
V
1.95
V
8
11
15
%
Output Overvoltage Fault-
Propagation Delay
tOVP
50mV overdrive
10
µs
4 _______________________________________________________________________________________
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